DI-SESS-82266A

Pod Master Event Spectrum (MES)

Describes the analysis of repeated loads experienced on the pod's structure, used to verify the pod's ability to meet durability, damage tolerance, and operational service life requirements specified in the contract.

Approval DateSeptember 30, 2024

AMSC NumberN10482

Preparing ActivityAS

Project NumberSESS-2024-030

OPR—

DTIC Applicable—

GIDEP ApplicableNo

Limitation—

Applicable Forms—

Approval Limitation—

Form Version—

DID Formatfree_text

963C CompliantYes

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Supersedes

DI-SESS-82266

—

Description & Purpose

—

Application & Interrelationship

—

Use & Relationship

The Pod Master Event Spectrum describes the analysis of the effects from repeated loads experienced on the pod's structure. The data will be used to verify the pod's ability to meet the durability, damage tolerance, and operational service life requirements specified in the contract.

This Data Item Description (DID) contains the format and content for data resulting from the work tasks described by the contract statement of work.

This DID supersedes DI-SESS-82266.

Preparation Instructions

1Reference documentsThe applicable issue of the documents cited herein, including their approval dates of any applicable amendments, notices, and revisions, shall be as specified in the contract.

2FormatContractor format acceptable.

3ContentThe Pod MES shall contain the following:

3.1Describe the aircraft MES that forms the basisDescribe the aircraft MES that forms the basis for the pod MES. The aircraft Master Event Spectrum (MES) is a profile of specific sequences and number of aircraft occurrences that reflect the fatigue exposure of the pod over a lifetime. It includes events such as taxis, takeoffs, flight maneuvers, and landings that are specific to a particular aircraft and set of missions.

3.2Describe pod specific modifications and additionsDescribe pod specific modifications and additions to the aircraft MES used to create the pod MES. Define the pod coordinate system and show how the aircraft MES is translated to the pod coordinated system. Define any factors beyond simple geometric translation that define the conversion of the aircraft MES to the pod MES, e.g. structural dynamic effects between the aircraft MES reference location and the pod MES reference location. Define pod specific events that alter loads in terms of sequence, duration, and number of occurrences, such as drag increase due to power generation or external surface actuations, or any pod event that alters external loads from the basic aircraft carriage loads.

3.3Describe the external loads time histories for eachDescribe the external loads time histories for each event in the pod MES. Include the reference coordinate system, six degree-of-freedom (6DOF) loads and accelerations, inertial and air loads, quasi-static shock loads, and any dynamic buffeting occurring.

3.4Describe methods and analytical tools used toDescribe methods and analytical tools used to perform the analysis, including rain flow counting methodology and any filters used to reduce or eliminate events from the pod MES.

References

—

Schema v3.0Community-maintained · Verify against ASSIST

Community-maintained — not an official government database.
Verify against ASSIST·GitHub·About·Disclaimer